/Engine/Plugins/Runtime/MassEntity/Source/MassEntity/Public/MassObserverRegistry.h
[UCLASS](Programming/UnrealArchitecture/Reference/Classes#classdeclaration)() class UMassObserverRegistry : public [UObject](API\Runtime\CoreUObject\UObject\UObject)
friend
FMassObserverManager
FMassEntityObse...
FragmentObservers
FMassEntityObse...
TagObservers